Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f8a1013308b314b…

MALICIOUS

PDF

46.2 KB Created: 2020-08-01 05:18:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8615bb47f46afbac67fdec30210ec533 SHA-1: 76935e6379fac31a17a63b71ddf1dac222ae81f9 SHA-256: 6f8a1013308b314b17d3bcc54748efa45e52598e8cfb3b04e9c3cc76c57a1a59
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF was flagged as malicious by an ML classifier and contains a link to a known malicious redirector. It also features a large number of embedded links to external PDFs, suggesting a link farm or SEO manipulation tactic. While no scripts were directly extracted, the PDF structure and embedded links indicate a potential for malicious redirection or content delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=battlestar+galactica%2528+1978%2529
    • http://files.ileaghkerr.co.uk/uploads/1/3/2/8/132814067/semor_mesabi.pdf
    • http://files.oceanateachbz.com/uploads/1/3/0/8/130814630/bepopadedunaw.pdf
    • http://files.nicoleianuzelli.com/uploads/1/3/1/3/131380814/zusemotut_firafivufutufig_bitegom.pdf
    • http://files.greytangels.com/uploads/1/3/1/4/131453051/7653621.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7778/6018/files/bapepoxotud.pdf
    • https://cdn.shopify.com/s/files/1/0429/1434/9215/files/lajevivewizozawipokunek.pdf
    • https://cdn.shopify.com/s/files/1/0431/2770/1655/files/wogokofenilidajop.pdf
    • https://cdn.shopify.com/s/files/1/0438/7300/9819/files/62999116998.pdf
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/33590699545.pdf
    • https://cdn.shopify.com/s/files/1/0429/6962/8828/files/81777009421.pdf
    • https://cdn.shopify.com/s/files/1/0427/8976/5279/files/ditaletodab.pdf
    • https://cdn.shopify.com/s/files/1/0428/3426/4231/files/gigenu.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/pivuferilifujonajaju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/19189676900.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/letowopebofowebizuwir.pdf
    • https://cdn.shopify.com/s/files/1/0436/1479/7981/files/tegisugakuwinirexajij.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007525.bin
dc0a9ea93e6b732e738458461c575d36d64b06782b26f77803f52e1d3dc6a7ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x7525 5652 bytes
font_01_sfnt_off00008883.bin
d5123e1eb1d44a48b0ac590867c1b443cf96839c1587a00bf6fcc97d62572d0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8883 10428 bytes